【单选题】Which of the following is NOT a feature of a typical bacterial operon?
A.
The genes are translated into a single polypeptide.
B.
The genes in the operon are transcribed into a single mRNA molecule.
C.
The genes frequently encode proteins that are involved in a single biochemical pathway.
D.
The genes are under the control of a single promoter.
【单选题】下列关于量变与质变的辩证关系,正确的表述是() 1二者互为前提和基础 2量变是质变的前提和必要准备 3外因引起量变,内因引起质变 4质变是量变的必然结果
【判断题】所有的进出口公司都必须直接向海关办理报关手续
【单选题】Which one of the following statements about the trp operon is true?
A.
the Trp repressor is a product of the trp operon.
B.
the Trp repressor, like the Lac repressor, is a tetramer of identical subunits.
C.
the Trp repressor binds to tryptophan.
D.
tryptophan activates expression from the trp operon.
【多选题】Operon is composed of
D.
other regulatory sequences.
【单选题】一位35岁的中年人为锻炼身体准备购买体育用品和选择运动场地,他在羽毛球和网球运动中选择了去体育馆打羽毛球,则这两种运动之间是
【多选题】关于发展,正确的表述是( )。
C.
唯物辩证法关于事物普遍联系和变化发展的观点,是科学发展观的哲学基础
【单选题】为了查看连接到域中的用户打开了的资源,作为域的管理员可使用NT5的: